Leister GEOSTAR high performance wedge welder
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up to 12.0 m/min (39 ft/min)
1800 / 2800 W
G5: 16.4 kg (36 lb)
G7: 17.7 kg (39 lb)
up to 1500 N (digitally controlled)
460° C (860° F)
GEOSTAR - Product Description

GEOSTAR – faster, lighter, smarter

Welcome to a new dimension in civil engineering with Leister‘s new „Faster, Lighter, Smarter Wedge“! The advent of the GEOSTAR for welding geomembranes marks the appearance of a hot wedge welding machine perfected for civil engineering that redefines state-of-the-art technology.

The compact, cast aluminum frame construction offers sporty maximum power for the hardest applications: With heating capacity/heating power of up to 2500 Watts, peak welding speeds of up to 12 m/min (39 ft/min) and height-adjustable chassis, the GEOSTAR can handle any terrain without difficulty.

The digital operating unit (“eDrive”) with integrated display permits permanent monitoring of all the key weld parameters (heat, speed, pressure and voltage) during work process.

This sleek new design makes field servicing a cinch - wedge can be removed and replaced in under a minute. Additional features include easy loading of material, natural flow of material through the machine, integrated clamping grip engagement, innovative ergonomics that allow one-hand operation and three different parking and maintenance positions.

GEOSTAR - The Video

Leister‘s new „Faster, Lighter, Smarter Wedge“

  • Welding speed up to 12 m/min (39 ft/min)
  • With 16.4 kg (G5) and 17.7 kg (G7) around 20 – 50% lighter than comparable machines
  • Very high heating capacity / heating power
  • Digital welding pressure display
  • Welding wedge replacement in less than 1 minute!
  • Integrated voltage display
  • Adjustable chassis height
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LQS - Leister Quality System

The Leister Quality System (LQS) allows you to compile full quality documentation for all aspects of your welding work. You can document every welding seam as a table, graphic or even with GPS coordinates. The GEOSTAR G7 / G5 LQS provides all the advantages of state-of-the-art technology. It really stands out from the crowd – helping you to win over your client!

  • Welding protocols
  • Easily create DVS reports
  • Intuitively archive data
  • Automatic cloud synchronization
  • Protection from loss and falsification
  • Weld seam Position recording via GPS
  • Wi-Fi technology
  • Automatic device recognition
  • Administer up to 50 devices per account
  • Internal data storage prevents data loss
  • Helps with crew supervision
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GEOSTAR - Technical Data
Dimensions (L x W x H) mm 482 x 278 x 269 482 x 278 x 269
Drive speed *1 m/min 0.8 - 12
Level 1: 0.8 - 6
Level 2: 1.5 - 12
0.8 - 12
Level 1: 0.8 - 7
Level 2: 1.5 - 12
Frequency HZ 50 / 60 50 / 60
Mark of conformity Icon CE Certificate Icon CE Certificate
Max. heating temperature °C 460 460 °
Max. overlap mm 150 150
Max. welding force 1500 1500
Power W 1800 / 2800 2800
Voltage V~ 120 / 230 230
Weight kg 16.4 17.7
Weld width with test channel mm 2 x 15mm 2 x 15mm
Welding Wedge mm 90 x 50 130 x 50
Materials HD-PE 0.8 - 3.0mm PP, LD-PE, TPO, FPO PVC-P (with steel wedge) HD-PE 1.0 - 3.0mm PP, LD-PE, TPO, FPO
Buy GEOSTAR G5 now! Buy GEOSTAR G7 now!
GEOSTAR Working Positions

Three Positions



Start and working position.


Simple maintenance or cleaning. Best for quick cleaning of welding wedge, contacting system and for cooling down during interruptions.


Upside-down position for simple maintenance or cleaning. Best for setting chassis height, changing drive rollers or cleaning track rollers.
Leisters GEOSTAR G5/G7
GEOSTAR field-testing in Germany
Leisters GEOSTAR G5/G7
GEOSTAR field-testing: Mining in Chile
Leisters GEOSTAR G5/G7
GEOSTAR field-testing: Mining in Chile
GEOSTAR field-testing in Germany
GEOSTAR field-testing in Germany
GEOSTAR field-testing at the Netherlands
GEOSTAR field-testing in the Netherlands
GEOSTAR field-testing at the USA
GEOSTAR field-testing in the USA
Leister. We know how.
Short Videos


  • How to Use the Carrying Handle of the GEOSTAR
  • GEOSTAR eDrive Display
  • GEOSTAR Pressure Control
  • GEOSTAR Wedge Welder in Motion
  • GEOSTAR Chain Drive Exchange
  • GEOSTAR Adjustable Chassis Height
We are local - worldwide
Leister Technologies AG
Galileo-Strasse 10
CH-6056 Kaegiswil / Switzerland

Phone +41 41 662 74 74
Fax +41 41 662 74 16
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